I’ve been digging up a lot in the forums and communities, and so far I can tell that would require a lot of coding for lots and specific services. As far as there are too many available, if it was “universal”, I think it would be fine to implement such feature.
By the way, it’s a bit obvious to tell that a certain 2FA method has been set by not having it listed on your Bitwarden’s vault. After all, you have to set all them up manually, one by one. Cmiiw.
EDIT: This can also help you for further details. It has been discussed here before, I’ve just found it.